、 32按分子轨道理论,O2的键级是- ( ) [ 1 分 ] A. 1 B. 1 C. 2 D. 、 32按分子轨道理论,O2的键级是- ( ) [ 1 分 ] A. 1 B. 1 C. 2 D. 2 分类:电气测量技术 题型:选择题 查看答案
24. After reading the report, the police chief ord 24. After reading the report, the police chief ordered that parking ______ on Ma 分类:电气测量技术 题型:选择题 查看答案
You ______her at the beginning, but now it is too You ______her at the beginning, but now it is too late.(本题3.5分) A、 ought to have 分类:电气测量技术 题型:选择题 查看答案